An interesting interval in a wellbore. The human contextual name assigned to the interval. This name might represent the geology of the interval if appropriate. The starting measured depth of the interval. The ending measured depth of the interval. The starting true vertical depth of the interval. The ending true vertical depth of the interval. The date and time associated with this interval The pressure in the interval. A classification of the interval. A comment about the classification. The item state for the item. The unique identifier of the element.